in的用法及短语

in是介词，后面必须接名词，代词或者动名词，可表示时间，地点，位置，手段，方向，目的，数量等含义。

短语

in advance提前,

in all总共，

in balance总而言之，

in bed卧床，

in body亲自，

in brief简明扼要，

in case万一,

in charge主管

In our company, quality is high on the agenda.

我们公司高度重视质量。

We had a day out in the country.

我们在乡下玩了一天。

A new system has been devised to control traffic in the city.

控制城市交通的新系统已经设计出来。